What you allow your milieu to feed into your mind is what you will be processing. It is what will carve the pathways of your brain. This is perhaps well-understood, in theory if not in practice.
But it is equally important to consider who and what you are sending output to.
I wanted to share my most memorable VC pass email of all time, Maple back in the fall from @schlaf. Thoughtful and empathetic:
"I've been wrong more than I've been right so take this all with a grain of salt. I hope you prove me wrong and make me regret this decision."